feat(terraform): Add fixed internal IP for gw host

terraform/k8s01/network.tf

@@ -14,4 +14,5 @@ resource "hcloud_server_network" "srvnetwork" {
   count      = length(module.gw.server_ids)
   server_id  = element(module.gw.server_ids, count.index)
   network_id = hcloud_network.network.id
+  ip         = cidrhost(var.subnet_cidr, count.index + 2)
 }
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